Re: 0(1)-patch, where did it go?

Dieter Nützel
2002-04-11T03:44:21Z

On Donnerstag, 11. April 2002 :30, Robert Love wrote:
> On Wed, 2002-04-10 at 23:27, Dieter Nützel wrote:
> > But I see some kernel hangs with preemption on UP.
> > It happens only during "make bzlilo" (the linking stage). Robert?
> > Apart from that it works well.
>
> It is probably lock-break, not preempt. I don't have lock-break patches
> for 2.4.19-pre yet. Lock-break/low-latency and the more general lock
> breaking / explicit schedule work is very reliant on the version of the
> kernel they were designed against. This is why this approach is not a
> proper long-term solution ...

OK, thanks Robert will try without it after some sleep.

But preemption without lock-break on 2.4 is like running without preemption.
The general latency problem with O(1) for 2.4 still stands.
Do you have similar observations with the current -ac tree?
You should have my numbers.

I only would bring your focus somewhat back to 2.4 'cause 2.6 is so far...

Thanks,
Dieter